code: def test_alpha_1(self, im_shape, input_type):
      im = self.get_data(im_shape, input_type)
      alpha = 1.0
      t = GibbsNoise(alpha)
      out = t(deepcopy(im))
      assert_allclose(
          out, 0 * im, rtol=1e-7, atol=0, type_test="tensor"
      )
  
file_path: MONAI/tests/test_gibbs_noise.py
imports: from __future__ import annotations
  import unittest
  from copy import deepcopy
  import numpy
  from parameterized import parameterized
  from monai.data.synthetic import create_test_image_2d, create_test_image_3d
  from monai.transforms import GibbsNoise
  from monai.utils.misc import set_determinism
  from monai.utils.module import optional_import
  from tests.utils import TEST_NDARRAYS, assert_allclose
label_desc: Use image node_id 6 for calling the TestGibbsNoise obj's underlying member method code with example usage: obj.test_alpha_1(im_shape, input_type) without return types